arm2riscv

Arm AArch64 to RISC-V Transpiler

By Moshe Schorr (mosheraphael@gmail.com) and Matan Ivgi (mdivgi@gmail.com), supervised by Hillel Mendelson (hillelm@il.ibm.com), Shay Aviv (Shay.Aviv@ibm.com), Hernan Theiler (Hernan.Theiler@il.ibm.com), and Tom Kolan (tomk@il.ibm.com) at IBM Research Haifa.

Usage

Pipe Arm assembly in, it writes RISC-V assembly to stdout.

For instance, the test code is essentially along the lines of: armgcc -S -o - <input file name> | python3 arm2riscv.py | rvgcc -x assembler - -static.

For compiling C to RISC-V through the transpiler, there's a shortcut: ./compile_thru_arm2riscv.sh <file name>.

Run python3 arm2riscv.py -h for fuller usage and flags.

Test Suite

python3 test_suite.py runs the testing.

Setup:

Requires: Python 3.6 or newer

You can use the dockerfile, or manually set up a test environment.

Python Dependencies

• lark-parser (pip install lark-parser)
• tqdm (tests) (pip install tqdm)

Compilers

The safest option is to stick to the tested versions on Ubuntu, since both were tested on version 7.4.0. Both compiler toolchains are needed to run the test suite. Run:

• sudo apt-get install gcc-aarch64-linux-gnu=4:7.4.0-1ubuntu2.3
• sudo apt-get install gcc-riscv64-linux-gnu=4:7.4.0-1ubuntu1.3

Qemu

Since the correct qemu-static-user binaries are hard to find, they're included. Copy both of them (qemu-aarch64-static, qemu-riscv64-static) from testing/qemu_binaries to /usr/local/bin so they're visible to the testing.

Tests should now be runnable -- python3 test_suite.py in the main directory should be able to run it.